Improvement in manufacture of soap



UNITED STATES PATENT OEFIcE.

D. CRAWFORD, OF TORONTO, CANADA.

IMPROVEMENT IN MANUFACTURE OF SOAP.

Specification forming part of Letters Patent No. 19.754, dated March 30, 1858.

To all whom it may concern:

Be it known that I, DALRYMPLE CRAW- FORD, of Toronto, in the county of York, in the Province of Canada, have invented a new and useful Improvementin the Preparation of Soap; and I do hereby declare that the fol lowing is a full and exact description of the principle or character which distinguishes it from all other things before known, and of the usual manner of applying and modifying the same.

I obtain or make a soap from the usual materials-via, a fat or oil and an alkali with or Without rosin-and by any of the usual processes well known to and adopted by manufacturers of that article. I take from the refuse of Indian corn, after it has been subjected to the process of extracting the starch in the manufacture of starch, by the use of an alkali which enters into combination with a portion of the constituent parts of the corn, causing them to separate from the starch when in water. If the refuse is not very fine, I sift out any of the coarser parts, or grind them down to 'a fine pulpy extract. After straining off any excess of water I mix this extractin variable proportions with soap in its soft state. The whole is then well mixed together,and may be boiled for a short time or not before putting into molds or vessels.

Foruse twenty-five per cent. of extract to one hundred parts of soap is avgood proportion; but more or less may be mixed. Some additional alkali may be put to the extract.

I consider this extract a valuable and eco' nomical substance to mix with soap, as it contains a considerable quantity of alkali, and is a good detergent in itself.

Ido not claim mixing flour, corn-meal, starch, or vegetable matter generally with soap. I do not claim making soap with a fat or oil and an alkali with or without rosin.

I claim- Mixing with soap the refuse from Indian corn after it has been subjected to the action of alkali in extracting the starch, as substantially set forth above.

D. CRAWFORD.

Witnesses G. B. ROBARTS, J OHN A. GULL. 

